Marine-leg-pushing device



(No Model.) 2 sheetssheet 1.

H. E. HAND 8v L. GR'EENBERG. MARINE LEG PUSHING DEVICE. No. 593,743.M Patented Nov. 16,1897.

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(No Model.) 2 Sheets-Sheet 2.

H. E. HAND"& L. GREENBERG.

MARINE LEG PUSHING DEVICE. No. 593,743.

0 Patented Nov. 16,1897.

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HAvELooK E. HAND AND YLoUIs GREENBERG, or BurFALo, NEw YORK.

MARINE-LEG-PUSHING DEVICE.

SPECIFICATION forming part of Letters Patent No. 593,743, dated November 16, 1897.

Application filed .T une 30, 1897. Serial No. 642,962. (No model.)

To all whom it may con/cern.-

Beit known that we, I-IAvELocK E. HAND, a citizen of the United States, and LOUIS GREEN- BERG, a subject of Her Majesty the Queen of Great Britain, residing in the city of Buffalo, Erie county, State of New York, have invented a new and useful Marine-Leg-Pushing Device, of which the following is a specification.

Our invention relates to a device for the purpose of pushing a marine leg (used for unloading grain from vessels) out from the house or tower in which it is suspended to any desired point over a vessel and at the same time permitting the raising or lowering of the marine leg. i

This device may be operated by hand or such other motive power as may be used for operating the marine leg.

Our device also maintains the marine leg at any desired point and, being always in contact with the marine leg, prevents it from dropping backward into the house or tower unless so desired by the operator.

We attain these objects by the rotation of a screw in a nut, which nut is pivoted to a boom having at its other extremity a roller. As the screw rotates in a right or left hand direction the nut is lowered or raised, giving an outward or inward motion tothe boom. To the sides of the boom directly back of the roller are attached rods, the other ends of which rods are pivot-ed to a convenient and suitable point of the tower or house. By means of these rods 4and springs working in conjunction with them the roller end of boom is kept always in contact with the marine leg, thus imparting the outward or inward motion of the boom to the marine leg, as more fully explained by the accompanying drawings, in which- Figure 1 is a general view of the tower or house, showing the marine leg and our pushing device in three different positions. Fig. 2 is an enlarged View of the pushing device in the different positions shown in Fig. 1. Fig. 3 is aL plan View of our pushing device, showing the boom fully extended. Fig. 4; is an enlarged plan of the roller end of the boom. Fig. 5 is a vertical section on line x m of Fig. 4.

Similar letters refer to similar parts throughout the several views.

A, Fig. 1, is the marine-leg tower or house,

in which the marine leg B is suspended in the position shown.

The screw G, Fig. 2, is caused to rotate in its bearings C C by the shaft c through the medium of any suitable system of gearing, that shown lin the drawings forming no part of our present invention. As the screw Grotates in a left-hand direction Vit imparts a downward motion to the nut K. To this nut K is pivot-ed one end of a boom L, having a roller M at its other extremity. This roller M revolves on a shaft m, which shaft is rigidly flxed to the boom L. The rods N N are pivoted\to the tower A at n and to the shaft o, on which are mounted the wheels O O, Figs. 4 and 5, which wheels travel in slots in the sides of the boom L and are connected with each other by the shaft o. These rods N N necessarily give the roller end of boom L an outward motion, as the nut K travels downward on the screw G. This outward motion of the boom L is imparted to the marine leg B, thus forcing the marine leg B outward. The marine leg also being lowered during this operation, it takes up the position B and the boom the position L', Figs. 1 and 2. Now as the grain is elevated the marine leg gradually moves downward and outward into the new position B2, Fig. 1. As this movement of the marine leg is taking place there is a gradual relaxation of the tension on springs Q Q, connected to the boom L at q and to the shaft o at q', Figs. 4. and 5, allowing a contraction of the springs Q Q, which contraction causes wheels O O to move forward in the slots in the sides of the boom. These wheels O O being connected with the rods N N impart to the rods a lifting motion, thereby causing the boom to move outward and upward into the position L2, Figs. 1 and 2. Thus the roller M is kept always in contact with the marine leg, thereby preventing the leg from dropping backward except at the will of the operator.

To allow the marine leg, in being elevated back into the tower, to return to theiposition B in the tower or house A, Fig. 1, the motion of the whole mechanism, as above described, is reversed, thus allowing the leg to follow the boom back into the position B in house or tower A, Fig. 1. The shaft'c is caused to roo The pulleys D2 D3, Fig. 3, are loose pulleys and serve only to carry the belts E E when our device is not in operation.

The shaft cmay also be driven by handpower by means of an endless rope R, Fig. 2,

passing around a grooved pulley S, Fig. 2, directly attached to the shaft c.

lVe do not wish to limit ourselves to the specific details of construction and arrangement herein shown and described, because it is obvious that the apparatus may be 1n odiied in many ways without departing from our invention.

Having described our invention, what we claim as ours, and desire to secure by Letters Patent, is-

l. The combination with the elevator tower or structure and the elevator-leg which is supported and capable of vertical movement in the same, of a pushing device arranged in said tower or structure and comprising a movable boom against which the leg rests, the leg being free to be raised and lowered past the outer end of the boom, a support for the outer end of the boom, and an adjusting device whereby the boom is moved in and out, substantially as set forth.

2. A marine-leg-pushin g device comprising a boom adapted to bear with its outer end against the leg, a support for the outer end of the booin, a screw-nut to which the inner end of the boom is pivoted, and an actuatingscrew, substantially as set forth.

3. A marine-leg-pushingdevice comprising a boom adapted to bear against the leg, said boom consisting of side pieces having longitudinal slots near their outer ends, a springpressed shaft arranged in said slots, pivoted supporting-rods connected to said shaft, and an actuating-screw and nut whereby the boom is moved in and out, substantiallyas set forth.

HAVELOCK E. HAND. LOUIS GREENBERG. lVitnesses:

WM. H. MINES, EDWARD F. PICKETT. 

